{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,5,15]],"date-time":"2025-05-15T19:05:05Z","timestamp":1747335905171,"version":"3.40.5"},"reference-count":38,"publisher":"Cambridge University Press (CUP)","license":[{"start":{"date-parts":[[2018,11,15]],"date-time":"2018-11-15T00:00:00Z","timestamp":1542240000000},"content-version":"unspecified","delay-in-days":0,"URL":"https:\/\/www.cambridge.org\/core\/terms"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["J. Helminthol."],"published-print":{"date-parts":[[2020]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:p>Hookworms of the genus <jats:italic>Uncinaria<\/jats:italic> parasitize pinniped pups in various locations worldwide. Four species have been described, two of which parasitize pinniped pups in the southern hemisphere: <jats:italic>Uncinaria hamiltoni<\/jats:italic> parasitizes <jats:italic>Otaria flavescens<\/jats:italic> and <jats:italic>Arctocephalus australis<\/jats:italic> from the South American coast, and <jats:italic>Uncinaria sanguinis<\/jats:italic> parasitizes <jats:italic>Neophoca cinerea<\/jats:italic> from the Australian coast. However, their geographical ranges and host specificity are unknown. <jats:italic>Uncinaria<\/jats:italic> spp. are morphologically similar, but molecular analyses have allowed the recognition of new species in the genus <jats:italic>Uncinaria<\/jats:italic>. We used nuclear genetic markers (internal transcribed spacer (ITS) and large subunit (LSU) rDNA) and a mitochondrial genetic marker (cytochrome <jats:italic>c<\/jats:italic> oxidase subunit I (COI)) to evaluate the phylogenetic relationships of <jats:italic>Uncinaria<\/jats:italic> spp. parasitizing <jats:italic>A. australis<\/jats:italic> and <jats:italic>O. flavescens<\/jats:italic> from South American coasts (Atlantic and Pacific coasts). We compared our sequences with published <jats:italic>Uncinaria<\/jats:italic> sequences. A Generalized Mixed Yule Coalescent (GMYC) analysis was also used to delimit species, and principal component analysis was used to compare morphometry among <jats:italic>Uncinaria<\/jats:italic> specimens. Parasites were sampled from <jats:italic>A. australis<\/jats:italic> from Peru (12\u00b0S), southern Chile (42\u00b0S), and the Uruguayan coast, and from <jats:italic>O. flavescens<\/jats:italic> from northern Chile (24\u00b0S) and the Uruguayan coast. Morphometric differences were observed between <jats:italic>Uncinaria<\/jats:italic> specimens from both South American coasts and between <jats:italic>Uncinaria<\/jats:italic> specimens from <jats:italic>A. australis<\/jats:italic> in Peru and southern Chile. Phylogenetic and GMYC analyses suggest that south-eastern Pacific otariid species harbour <jats:italic>U. hamiltoni<\/jats:italic> and an undescribed putative species <jats:italic>of Uncinaria.<\/jats:italic> However, more samples from <jats:italic>A. australis<\/jats:italic> and <jats:italic>O. flavescens<\/jats:italic> are necessary to understand the phylogenetic patterns of <jats:italic>Uncinaria<\/jats:italic> spp. across the South Pacific.<\/jats:p>","DOI":"10.1017\/s0022149x18000950","type":"journal-article","created":{"date-parts":[[2018,11,15]],"date-time":"2018-11-15T02:54:33Z","timestamp":1542250473000},"source":"Crossref","is-referenced-by-count":2,"title":["Morphometrical and molecular evidence suggests cryptic diversity among hookworms (Nematoda: Uncinaria) that parasitize pinnipeds from the south-eastern Pacific coasts"],"prefix":"10.1017","volume":"94","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-5787-4364","authenticated-orcid":false,"given":"M.T.","family":"Gonz\u00e1lez","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Z.","family":"L\u00f3pez","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"J.J.","family":"Nu\u00f1ez","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"K.I.","family":"Calder\u00f3n-Mayo","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"C.","family":"Ram\u00edrez","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"D.","family":"Morgades","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"H.","family":"Katz","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"M.","family":"George-Nascimento","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"H.","family":"Pav\u00e9s","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"56","published-online":{"date-parts":[[2018,11,15]]},"reference":[{"key":"S0022149X18000950_ref102","doi-asserted-by":"publisher","DOI":"10.1016\/j.tree.2017.11.007"},{"key":"S0022149X18000950_ref10","first-page":"1","volume":"38","year":"1982","journal-title":"Monograph"},{"key":"S0022149X18000950_ref38","doi-asserted-by":"publisher","DOI":"10.1080\/00288330.2012.753463"},{"key":"S0022149X18000950_ref9","first-page":"772","volume":"9","year":"2012","journal-title":"Nature Methods"},{"volume-title":"PAUP*. 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